Independent solar numbers for your postcode using official UK data
Home Regions Guides Compare quotes Solar assistant
Insights
Big Roof Britain Solar Payback Index Standing Charge Drag Roof Direction Penalty Winter Solar Reality Seasonal Solar Output

Solar panel cost in Bath and North East Somerset (BA3)

See realistic solar installation costs, savings and payback for BA3 (Bath and North East Somerset) in under a minute using official UK data. Start with the calculator, then get a no-obligation quote from an MCS-certified installer. You can also ask the SolarByPostcode assistant to sanity-check your roof, bills and plans.

Solar Calculator

Change the settings below to see how costs and savings work for your situation.

System Size

Roof Direction

Battery Storage

Export Value

Your Numbers

Break-even
9.8 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£828
What you save every year
Profit Over 25 Years
£12,552
After paying itself off, you're this much ahead

Ready to Get Started?

Get your free quote from Blue Ape Renewables. They'll connect you with MCS-certified installers in your area and handle all the paperwork.

Get Solar Quote →
4.8★ Trustpilot • Octopus Energy trusted partner • MCS certified • No obligation
How we calculate this

Solar generation: Based on typical south-facing roof at 35° angle. We account for weather, dirt, and system losses (14%).

How much you'll use directly:

  • Without battery: You'll use about 40% of what you generate. The rest gets sold back to the grid.
  • With 5 kWh battery: You'll use about 70% (battery stores extra for evening use).
  • With 10 kWh battery: You'll use about 75% (more storage means less exported).
  • Panel-only payback: The official cost per kW is lower above 4 kW, so a 5–6 kW system can pay back a little faster than a 3–4 kW system on otherwise identical assumptions.
  • Battery & payback: Batteries raise self-use and cut bills, but added hardware cost often lengthens break-even at typical UK rates.
  • When a battery can still make sense:
    • Evening-heavy usage patterns
    • Time-of-use tariffs / cheap night rates
    • Low export rate vs. high unit rate
    • Heat pump or EV charging synergy
    • Optional backup/resilience (system-dependent)
    • Lower evening-hour CO₂ vs. grid

Panel costs: Uses March 2026 TIC mean installation costs: £1,827/kW up to 4 kW and £1,628/kW above 4 kW.

Other costs: Battery prices are modelled at £700 per kWh. Export tariffs vary by supplier (usually 5–15p per kWh).

Grid connection: Systems up to about 3.7 kW typically need just a notification (G98). Larger systems may need permission (G99).

These are typical values based on average usage patterns. Your actual results will vary based on your roof, shading, and how you use electricity.

Your area in context

In Southern Western, the current unit rate is 26.39p/kWh with a 57.89p/day standing charge. Your postcode’s south-facing sunshine yield is 1000 kWh/kW — 14 below the regional median (1013).

Read the full story

A typical roof here lands around 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1000 kWh per year on a south-facing roof. We value self-used electricity at 26.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.4p/kWh
Standing charge
57.9p/day
Sunshine yield (south)
1000 kWh/kW
Export price (baseline)
10p/kWh

Browse the scenarios below. Each battery size has its own expand — open the one that matches your plan (or just explore). For each system size (2–8 kW) we show annual output, how much you use directly, what gets exported, annual benefit, upfront cost, break-even, and a 20-year net. Negative numbers are possible — that’s the honest trade-off when adding more battery than your usage profile justifies.

No battery 5 kW example → Annual benefit: £828, Upfront: £8,139, Break-even: 9.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2000 kWh 800 kWh 1200 kWh £211 £120 £331 £3,256 9.8 yrs £3,366
3 kW 2999 kWh 1200 kWh 1800 kWh £317 £180 £497 £4,883 9.8 yrs £5,048
4 kW 3999 kWh 1600 kWh 2400 kWh £422 £240 £662 £6,511 9.8 yrs £6,731
5 kW 4999 kWh 2000 kWh 2999 kWh £528 £300 £828 £8,139 9.8 yrs £8,414
6 kW 5999 kWh 2400 kWh 3599 kWh £633 £360 £993 £9,767 9.8 yrs £10,097
7 kW 6999 kWh 2799 kWh 4199 kWh £739 £420 £1,159 £11,394 9.8 yrs £11,780
8 kW 7998 kWh 3199 kWh 4799 kWh £844 £480 £1,324 £13,022 9.8 yrs £13,462

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £992, Upfront: £10,239, Break-even: 10.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2000 kWh 1200 kWh 800 kWh £317 £80 £397 £5,356 13.5 yrs £2,577
3 kW 2999 kWh 1800 kWh 1200 kWh £475 £120 £595 £6,983 11.7 yrs £4,915
4 kW 3999 kWh 2400 kWh 1600 kWh £633 £160 £793 £8,611 10.9 yrs £7,253
5 kW 4999 kWh 2999 kWh 2000 kWh £792 £200 £992 £10,239 10.3 yrs £9,591
6 kW 5999 kWh 3599 kWh 2400 kWh £950 £240 £1,190 £11,867 10.0 yrs £11,930
7 kW 6999 kWh 4199 kWh 2799 kWh £1,108 £280 £1,388 £13,494 9.7 yrs £14,268
8 kW 7998 kWh 4799 kWh 3199 kWh £1,266 £320 £1,586 £15,122 9.5 yrs £16,606

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,073, Upfront: £11,639, Break-even: 10.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2000 kWh 1400 kWh 600 kWh £369 £60 £429 £6,756 15.7 yrs £1,832
3 kW 2999 kWh 2100 kWh 900 kWh £554 £90 £644 £8,383 13.0 yrs £4,498
4 kW 3999 kWh 2799 kWh 1200 kWh £739 £120 £859 £10,011 11.7 yrs £7,164
5 kW 4999 kWh 3499 kWh 1500 kWh £923 £150 £1,073 £11,639 10.8 yrs £9,830
6 kW 5999 kWh 4199 kWh 1800 kWh £1,108 £180 £1,288 £13,267 10.3 yrs £12,496
7 kW 6999 kWh 4899 kWh 2100 kWh £1,293 £210 £1,503 £14,894 9.9 yrs £15,162
8 kW 7998 kWh 5599 kWh 2400 kWh £1,478 £240 £1,718 £16,522 9.6 yrs £17,828

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,098, Upfront: £13,389, Break-even: 12.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2000 kWh 1460 kWh 540 kWh £385 £54 £439 £8,506 19.4 yrs £279
3 kW 2999 kWh 2190 kWh 810 kWh £578 £81 £659 £10,133 15.4 yrs £3,043
4 kW 3999 kWh 2919 kWh 1080 kWh £770 £108 £878 £11,761 13.4 yrs £5,807
5 kW 4999 kWh 3649 kWh 1350 kWh £963 £135 £1,098 £13,389 12.2 yrs £8,572
6 kW 5999 kWh 4379 kWh 1620 kWh £1,156 £162 £1,318 £15,017 11.4 yrs £11,336
7 kW 6999 kWh 5109 kWh 1890 kWh £1,348 £189 £1,537 £16,644 10.8 yrs £14,100
8 kW 7998 kWh 5839 kWh 2160 kWh £1,541 £216 £1,757 £18,272 10.4 yrs £16,865

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,114, Upfront: £15,139, Break-even: 13.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2000 kWh 1500 kWh 500 kWh £396 £50 £446 £10,256 23.0 yrs £-1,340
3 kW 2999 kWh 2250 kWh 750 kWh £594 £75 £669 £11,883 17.8 yrs £1,490
4 kW 3999 kWh 2999 kWh 1000 kWh £792 £100 £892 £13,511 15.2 yrs £4,320
5 kW 4999 kWh 3749 kWh 1250 kWh £989 £125 £1,114 £15,139 13.6 yrs £7,149
6 kW 5999 kWh 4499 kWh 1500 kWh £1,187 £150 £1,337 £16,767 12.5 yrs £9,979
7 kW 6999 kWh 5249 kWh 1750 kWh £1,385 £175 £1,560 £18,394 11.8 yrs £12,809
8 kW 7998 kWh 5999 kWh 2000 kWh £1,583 £200 £1,783 £20,022 11.2 yrs £15,639

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,131, Upfront: £17,589, Break-even: 15.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2000 kWh 1540 kWh 460 kWh £406 £46 £452 £12,706 28.1 yrs £-3,659
3 kW 2999 kWh 2310 kWh 690 kWh £609 £69 £678 £14,333 21.1 yrs £-764
4 kW 3999 kWh 3079 kWh 920 kWh £813 £92 £905 £15,961 17.6 yrs £2,132
5 kW 4999 kWh 3849 kWh 1150 kWh £1,016 £115 £1,131 £17,589 15.6 yrs £5,027
6 kW 5999 kWh 4619 kWh 1380 kWh £1,219 £138 £1,357 £19,217 14.2 yrs £7,923
7 kW 6999 kWh 5389 kWh 1610 kWh £1,422 £161 £1,583 £20,844 13.2 yrs £10,818
8 kW 7998 kWh 6159 kWh 1840 kWh £1,625 £184 £1,809 £22,472 12.4 yrs £13,714

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

Figures are illustrative and use the same method as the calculator above. For exact results, adjust your roof direction, tariff, and usage in the calculator.

Before you request quotes in Bath and North East Somerset

Use the numbers above to sanity-check installer quotes. The main things to compare are system size, battery assumptions, payback claims, MCS certification, DNO paperwork and export assumptions.

Compare solar quotes before you sign

Check what MCS certification means

Understand DNO, G98 and G99 export limits

New quote check

Want a quote sanity check for BA3?

Share the first part of your postcode and a few basics. We’ll help you check whether system size, battery, export and paperwork assumptions look sensible before you commit to installer conversations.

This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

Request a quote sanity check →

Insights for BA3

Figures below are tailored to BA3 — click through for full league tables.

Big-Roof Britain Rank #987 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #574 of 2996
9.8 years (UK avg 10.8 years)
~£828 /yr • £8,139 upfront
Standing-Charge Drag Rank #1505 of 2996
25.5% (UK avg 26.6%) drag on savings
£211 fixed • ~£828 /yr value
Aspect Penalty View ranking →
East −19.8% West −20.3%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BA3

Monthly generation per kilowatt of solar panels

kWh 38 Jan 52 Feb 87 Mar 113 Apr 123 May 120 Jun 123 Jul 108 Aug 93 Sep 66 Oct 44 Nov 33 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.2% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 41 kWh per month; the average month produces around 83 kWh. So a typical 4 kW home system would generate roughly 164 kWh in winter, or 333 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.39p/kWh
Daily Fixed Charge
57.89p/day
Local Sunshine
1000kWh/kW
A 1 kW system generates ~1000 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
5.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 71% • Flats: 15% • Bungalows: 13% Based on 8,644 properties

Coverage

Bath and North East Somerset (57%)|Somerset (40%)|Wiltshire (2%)

Areas Covered

Mendip Hills, Radstock, Mendip Central and East, Westfield, Midsomer Norton Redfield, Frome North, Midsomer Norton North, Bathavon South + 4 more

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q3 2026

Installation costs: DESNZ/MCS data, March 2026 (TIC)

Property data: EPC open data (Open Government Licence), aggregated

All estimates are typical values. Actual results vary based on your specific situation, roof characteristics, and usage patterns.

Compare nearby areas

Nearby in Southern Western

BS39 (Bath and North East Somerset)
≈6.2 km away
Local sunshine: ~989 kWh/kWp · -1% vs BA3
BS18 (Bath and North East Somerset)
≈10.6 km away
Local sunshine: ~985 kWh/kWp · -1% vs BA3
BA2 (Bath and North East Somerset)
≈11.6 km away
Local sunshine: ~1,000 kWh/kWp · +0% vs BA3
BA4 (Somerset)
≈12.7 km away
Local sunshine: ~996 kWh/kWp · -0% vs BA3
BA1 (Bath and North East Somerset)
≈13.2 km away
Local sunshine: ~978 kWh/kWp · -2% vs BA3
BS31 (Bath and North East Somerset)
≈13.9 km away
Local sunshine: ~985 kWh/kWp · -1% vs BA3

Similar sunshine across the UK

MK40 (Bedford)
~1,000 kWh/kWp · +0% vs BA3
MK42 (Bedford)
~1,000 kWh/kWp · -0% vs BA3
NP9 (Newport)
~1,000 kWh/kWp · +0% vs BA3